// configure the editor to reference the following packages:

// * NUnit

// * NUnitLite

​

// Shortcut for .Net Fiddle:

// @nuget: NUnit

// @nuget: NUnitLite

​

using NUnit.Framework;

using Assert = NUnit.Framework.Legacy.ClassicAssert;

​

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using NUnit.Framework;

using FluentAssertions;

​

public class Program

{

    public static void Main()

    {

        int width = 4;

        int height = 7;

        foreach (var line in GetMultiplicationTable(width, height))

        {

            Console.WriteLine(line);

        }

        Console.WriteLine();

        Console.WriteLine("#### Test output ####");

       new NUnitLite.AutoRun().Execute(["--noc" /*no colored output for .Net Fiddle*/]);

     }

​

    public static IEnumerable<string> GetMultiplicationTable(int width, int height)

    {

        for (int i = 1; i <= height; i++)

        {

            yield return string.Join("\t", Enumerable.Range(1, width).Select(j => (i * j).ToString()));

        }

    }

}

​

[TestFixture]

public class MultiplicationTableTests

{

    [Test]

    public void TestMultiplicationTableOutput()

    {

        var expectedOutput = new List<string>

        {

            "1\t2\t3\t4",

            "2\t4\t6\t8",

            "3\t6\t9\t12",

            "4\t8\t12\t16",

            "5\t10\t15\t20",

            "6\t12\t18\t24",

            "7\t14\t21\t28"

        };

        var result = Program.GetMultiplicationTable(4, 7).ToList();

        result.Should().BeEquivalentTo(expectedOutput);

    }

}

​